Recently, a group of astrophysicists from Oxford, Southampton, and South Africa have found a very hot, impenetrable swirling wind around a black hole at a distance of 25,000 light-years from Earth. The team led by Phil Charles from the University of Southampton had found the gas comprised of ionized helium and hydrogen to be emitted in repeated explosions with a time gap of about 8 Minutes and it was seen around a black hole. According to Charles, the object observed was dubbed Swift J1357.2-0933 and it was first observed as an X-ray transient in 2011 as an outburst event.
This object consists of a low-mass star like our Sun and others, which is a white dwarf, neutron star, or black hole. The black hole compact is almost 6 times the Sun’s mass. This compact object pulls the materials from the normal star into the disc present in between the two. The outbursts occur when the disc has its materials boiling or unstable and thus, there are releases of a huge amount of energy. The ground-based telescopes showed dips in the optical brightness as the outbursts kept evolving. It is a strange event never observed before. Such an event was observed again in 2017which makes it necessary to study the strange behavior. The Southern African Large Telescope (SALT) was used to obtain the optical spectra during each dip so as to study its impact on the color. The ionized helium absorption and blue-shift were the spectral features mainly focused during the optical dips. The X-ray pressure generated near the black hole is pushing it away.
Likewise, Kianusch Mehrgan and her team from the Max Planck Institute’s found the gigantic black hole to ever be observed at the center of Holm 15A, which is a galaxy located 700 million light-years away. The Very Large Telescope array and the wealth of supplementary data from the Chile observatory were used by the astronomers to map the structure of Holm 15A.